Process of treating writing-paper.



UNITED STATES PATNT QI FIGEQ EMMETT H. CLIFTON, 0F BOSTON, MASSACHUSETTS, ASSIGNOR 0F ONE-HALF TO 3'. M. HESTER, OF BOSTON, MASSACHUSETTS.

PROCESS OE TREATING WRITING-PAPER.

No Drawing.

To all whom it may concern:

Be it known that I, EMME'rr II. CLIFTON, a citizen of the United States, residing at Boston, in the county of Suffolk and State of Massachusetts, have invented certain new and useful Improvements in Processes of Treating Writing-Paper; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

The invention relates to a process of preparing paper particularly adapted for use in the printing of checks, drafts, and other negotiable instruments to prevent raising of the checks and forging the names on checks by transferring of signatures under pressure, and also to provide a paper that will dispense with the necessity for the use of blotter in preparing checks and thereby aiding in forgery by transferring the signatures of. checks to the blotter and afterward using the blotter as means for making tracings of the signature.

In preparing my composition I take six parts of sulfuric acid commercially pure, and pour it into twenty-four parts of muriatic acid and immediately thereafter add seven hundred parts of pure water and thoroughly mix the solution.

The paper to be treated is submerged in the solution and allowed to remain until it is thoroughly saturated and then removed from the solution and permitted to dry by any suitable means such as the application ofheat, or simply by exposure to the atmosphere. Paper treated in this manner loses none of its characteristics except that ink applied thereto will instantly penetrate Specification of Letters Patent.

Patented May 18., 19115.

Application filed August 26, 1913. Serial No. 786,780.

into the pores of the fabric, but will not, in

ordinary cases, penetrate through the fabric the entire distance.

In practice I have found that paper treated in the manner above described when written upon will stand water soaking test without running or spreading of the ink and by submitting the paper to pressure of one hundred and fifty pounds to the square inch with tissue placed over the Writing no spreading or transferring. or penetrating of the tissue paper or of the paper originally written upon will take place, and furthermore when re-dried'the treated paper will stand the test of erasure. Another test of the permanency of the ink is to immerse the paper after having been Written upon in water heated to a temperature of 212' degrees Fahrenheit and immediately after dippingit in cold or ice water. The ink will not run when submitted to this test.

Having thus described the invention, what I claim is:

The process of treating calendered printing apers to be used, as checks, drafts and the like, which consists in immersing the papers in a bath composed of approximately six parts of sulfuric acid, twenty-four parts" of muriatic acid, and seven hundred parts of water, permitting the papers to remain in the bath until permeated with the compound, removing the papers and drying thesame.

In testimony whereof I atfix my signature in presence of two witnesses.

EMMEIT II. CLIFTON. Witnesses:

Junie B. McDoNALD, JosErH GOLDMAN. 

